| 2006-12-13 23:41:01 |
Kees Cook |
bug |
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added bug |
| 2006-12-14 00:34:23 |
Kees Cook |
title |
scripts/local-top/mdadm not being called? |
race condition between sata and md |
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| 2006-12-14 01:02:36 |
Kees Cook |
initramfs-tools: statusexplanation |
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| 2006-12-14 01:30:09 |
Kees Cook |
title |
race condition between sata and md |
initramfs script: race condition between sata and md |
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| 2006-12-14 01:31:53 |
Kees Cook |
bug |
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added attachment 'mdadm-race.patch' (wait for devices) |
| 2006-12-22 22:05:51 |
Reinhard Tartler |
mdadm: status |
Unconfirmed |
Confirmed |
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| 2006-12-22 22:05:51 |
Reinhard Tartler |
mdadm: importance |
Undecided |
High |
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| 2006-12-22 22:05:51 |
Reinhard Tartler |
mdadm: statusexplanation |
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I can confirm this bug, ajmitch is suffering as well from this. |
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| 2007-02-10 15:32:44 |
Reinhard Tartler |
bug |
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added subscriber Scott James Remnant |
| 2007-02-10 15:33:13 |
Reinhard Tartler |
bug |
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added subscriber Ian Jackson |
| 2007-02-10 15:36:00 |
Reinhard Tartler |
bug |
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assigned to lvm2 (Ubuntu) |
| 2007-02-12 18:17:11 |
Ian Jackson |
mdadm: status |
Confirmed |
Fix Committed |
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| 2007-02-12 18:17:11 |
Ian Jackson |
mdadm: assignee |
|
ijackson |
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| 2007-02-12 18:17:11 |
Ian Jackson |
mdadm: statusexplanation |
I can confirm this bug, ajmitch is suffering as well from this. |
I think I have fixed this in mdadm_2.5.6-7ubuntu4. Please could you install this, which I have just uploaded, and check if it works. |
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| 2007-02-16 10:14:31 |
Reinhard Tartler |
mdadm: status |
Fix Committed |
Confirmed |
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| 2007-02-16 10:14:31 |
Reinhard Tartler |
mdadm: statusexplanation |
I think I have fixed this in mdadm_2.5.6-7ubuntu4. Please could you install this, which I have just uploaded, and check if it works. |
Ian Jackson <iwj@ubuntu.com> writes:
> Could you please boot with break=premount, and do this:
> udevd --verbose >/tmp/udev-output 2>&1 &
> udevtrigger
> At this point I think you will find that your mds and lvms
> are not activated properly; check with
> cat /proc/partitions
The thing is that I cannot reproduce the problem this way, because my
raid and lvm devices come up as expected. The visible difference is,
that I get tons of output on the screen after having typed
udevtrigger. I suspect that they slow down udev's operation which avoids
the race condition. Is there some way to avoid this massive output on
the console while preserving the debug info on the tempfile?
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| 2007-02-16 19:26:03 |
Kees Cook |
title |
initramfs script: race condition between sata and md |
boot-time race condition initializing md |
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| 2007-03-08 18:35:26 |
octothorp |
bug |
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assigned to udev (Ubuntu) |
| 2007-03-13 08:56:27 |
Reinhard Tartler |
mdadm: statusexplanation |
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| 2007-03-28 06:58:48 |
Aurelien Naldi |
bug |
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added attachment 'udevd.out' (output of udevd --verbose) |
| 2007-03-29 18:01:46 |
Aurelien Naldi |
bug |
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added attachment 'aurelien_mdadmrace_logs.tgz' (some log files) |
| 2007-03-29 19:18:33 |
Reinhard Tartler |
bug |
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added attachment 'udev-output' (Udev debug log) |
| 2007-04-02 17:51:46 |
Scott James Remnant (Canonical) |
lvm2: status |
Unconfirmed |
Fix Released |
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| 2007-04-02 17:51:46 |
Scott James Remnant (Canonical) |
lvm2: statusexplanation |
|
We believe that this problem has been corrected by a series of uploads today. Please update to ensure you have the following package versions:
dmsetup, libdevmapper1.02 - 1.02.08-1ubuntu6
lvm-common - 1.5.20ubuntu12
lvm2 - 2.02.06-2ubuntu9
mdadm - 2.5.6-7ubuntu5 (not applicable unless you're also using mdadm)
udev, volumeid, libvolume-id0 - 108-0ubuntu1
The problem was caused by a number of ordering issues and race conditions relating to when lvm and mdadm were called, and how those interacted to ensure the devices were created and their contents examined.
This should work as follows:
* an underlying block device, sda1, is detected
* udev (through vol_id) detects that this is a RAID member
* udev invokes mdadm, which fails to assemble because the RAID-1 is not complete
* the creation of a new raid, md0, is detected
* udev fails to detect this device, because it is not yet complete
meanwhile:
* a second underlying block device, sdb1, is detected
* udev (through vol_id) detects that this is a RAID member
* udev invokes mdadm, which can now complete since the set is ready
* the change of the raid array, md0, is detected
* udev (through vol_id) detects that this is an LVM physical volume
* lvm is called to handle the creation of the devmapper devices
then
* various devmapper devices are detected
* the devices are created by udev, named correctly under /dev/mapper
* meanwhile the requesting application spins until the device exists, at which point it carries on
* udev (through vol_id) detects that these devices contain typical filesystems
* using vol_id it obtains the LABEL and UUID, which is used to populate /dev/disk
Note that this event-based sequence is substantially different from Debian, so any bugs filed there will not be relevant to helping solve problems in Ubuntu.
This should now work correctly. If it does not, I would ask that you do not re-open this bug, and instead file a new bug on lvm2 for your exact problem, even if someone else has already filed one, with verbose details about your setup and how you cause the error.
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| 2007-04-02 17:51:57 |
Scott James Remnant (Canonical) |
mdadm: status |
Confirmed |
Fix Released |
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| 2007-04-02 17:52:05 |
Scott James Remnant (Canonical) |
udev: status |
Unconfirmed |
Fix Released |
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| 2007-04-02 17:52:05 |
Scott James Remnant (Canonical) |
udev: statusexplanation |
This is very much udev's fault. A fix is reportedly in debian's 105-2 version. |
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| 2007-07-30 11:06:41 |
Reinhard Tartler |
bug |
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assigned to initramfs-tools (Ubuntu) |
| 2007-07-30 11:07:17 |
Reinhard Tartler |
initramfs-tools: status |
New |
Incomplete |
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| 2007-07-30 11:07:17 |
Reinhard Tartler |
initramfs-tools: importance |
Undecided |
High |
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| 2007-07-30 11:07:17 |
Reinhard Tartler |
initramfs-tools: statusexplanation |
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| 2007-08-18 06:47:55 |
Peter Haight |
bug |
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added attachment 'failed-raid.patch' (A patch to handle the case where there is a failed RAID drive.) |
| 2009-05-24 19:30:40 |
xteejx |
initramfs-tools (Ubuntu): status |
New |
Invalid |
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| 2009-12-09 11:45:28 |
Launchpad Janitor |
branch linked |
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lp:ubuntu/devmapper |
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| 2012-02-23 21:53:52 |
Kai Kasurinen |
removed subscriber Kai Kasurinen |
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